BoxingScene.com has been advised that WBC super bantamweight champion Abner Mares (25-0-1, 13KOs) is vacating his title and moving up in weight to the featherweight division. Mares' decision comes on the eve of the WBC's order to face mandatory challenger Victor "Viking" Terrazas (36-2-1, 21KOs). A purse bid was scheduled for this coming Friday.